EcoFlow RIVER 3 Plus Smart Extra Battery
CARO5**Verified price on 21 September 2026. The final price may vary.
EcoFlow RIVER 3 Plus Smart Extra expansion battery: +572 Wh (LiFePO4) for the EcoFlow RIVER 3 Plus Smart Extra. Works only with its compatible station.
Why use our link and our code?
Price history of EcoFlow RIVER 3 Plus Smart Extra Battery
| Period | Price |
|---|---|
| From 14 Sep 2026 to today | £99,00 |
| From 25 Aug 2026 to 13 Sep 2026 | £109,00 |
| From 27 Apr 2026 to 24 Aug 2026 | £119,00 |
| From 23 Feb 2026 to 26 Apr 2026 | £169,00 |
Video
Description
The EcoFlow RIVER 3 Plus Smart Extra is an expansion battery: it does not work on its own. It plugs into the EcoFlow RIVER 3 Plus Smart Extra to extend its runtime, adding 572 Wh of reserve with no output sockets of its own (the station manages everything).
Who is this extra battery for?
For anyone who already owns the EcoFlow RIVER 3 Plus Smart Extra and finds the runtime too tight: long weekends, working from a van, longer home backup. You roughly double the reserve without buying a whole new station.
How much runtime does it add?
With 572 Wh more in LiFePO4 (long cycle life), you noticeably extend the time before a recharge: another night off-grid, a longer run for the fridge during an outage, or back-to-back work days without mains.
Compatibility: check before you buy
This is the key point: the battery is designed for the EcoFlow RIVER 3 Plus Smart Extra, and only that. It connects with the dedicated cable and the station drives it automatically. Make sure you have the matching station before ordering.
Why buy from Vantour?
We work directly with EcoFlow, not as an anonymous stock reseller: a 100% genuine, official product, stock managed by the brand (real availability) and after-sales handled by the manufacturer for the longest cover possible.
On price, to give you a concrete idea:
The code applies on its own, and we keep all the latest EcoFlow offers up to date.
Helping you choose
Not sure this is the right expansion battery for you? Our guide to off-grid electric autonomy in a van helps you size your real need.
Technical specifications
| Capacity | 572.00 Wh |
|---|---|
| Net Weight | 5.80 kg (12.79 lb) |
| Dimensions | 234.00 mm (9.21 in) |
| USB-C | 1 port, 5V/9V/12V/15V⎓3A max, 20V/28V⎓5A max, 140W max |
| Battery Chemistry | LiFePO4, 3000 cycles to 80% capacity |
Compare with similar products
£99,00
This product
|
£2199,00
See the product
|
|
|---|---|---|
| Capacity | 572.00 Wh | 6,000.00 Wh |
| Net Weight | 5.80 kg (12.79 lb) | - |
| Dimensions | 234.00 mm (9.21 in) | 204.00 mm (8.03 in) |
Our verdict
Benefits
- +572 Wh of runtime for the EcoFlow RIVER 3 Plus Smart Extra
- LiFePO4, long cycle life
- Simple to connect, managed by the station
Disadvantages
- Works only with its compatible station
- No output sockets of its own
The ideal add-on if you already own the EcoFlow RIVER 3 Plus Smart Extra and need more runtime. Just check compatibility, that is the only real watch-out.
Frequently Asked Questions
Can I use it on its own, without the station?
How much does it add?
Customer reviews
Review
There are no reviews for this product yet.
Additional information
| Option | Price | Availability |
|---|---|---|
| EB300 | £99,00 £94,05 | In stock |
| EB600 | £259,00 £246,05 | Out of stock |
